Two air crafts that initally appeared to be on fire that made no noise

My mom was talking on the phone to my Grandma. In the middle of the conversation my mom looks out our window and yells, "Oh my God! There's a plane on fire!” We both then ran to our back deck and saw what looked like two bright, orange and yellow hazy triangular objects heading southbound. We thought it was two planes, possibly heading to Scott Airforce Base, on fire until the two bright somewhat triangular objects intertwined and switched sides. This definitely decreased the possibility of the objects being airplanes on fire. My mom contacted 911 and as she was on the phone the objects disappeared.

As for our backgrounds, my mom is 45 and a RN and I am 14 year old girl. We are both skeptical of UFOs and from an Airforce and Marine family.